{"id":141439,"date":"2025-08-24T11:11:56","date_gmt":"2025-08-24T09:11:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ataka-na-brauzernye-dopolneniya-s-menedzherami-parolej-ispolzuyushhaya-klikdzheking"},"modified":"2026-01-24T17:56:45","modified_gmt":"2026-01-24T15:56:45","slug":"ataka-na-brauzernye-dopolneniya-s-menedzherami-parolej-ispolzuyushhaya-klikdzheking","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/ataka-na-brauzernye-dopolneniya-s-menedzherami-parolej-ispolzuyushhaya-klikdzheking","title":{"rendered":"Ataque a extens\u00f5es de navegador com gerenciadores de senhas utilizando clickjacking","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na confer\u00eancia DEF CON 33, foi apresentado um m\u00e9todo de ataque a extens\u00f5es de navegador que inserem seus elementos de interface na p\u00e1gina exibida. A aplica\u00e7\u00e3o do ataque a extens\u00f5es com gerenciadores de senhas pode resultar na exposi\u00e7\u00e3o de informa\u00e7\u00f5es armazenadas nesses gerenciadores, como credenciais de autentica\u00e7\u00e3o, dados de cart\u00f5es de cr\u00e9dito, informa\u00e7\u00f5es pessoais e senhas \u00fanicas para autentica\u00e7\u00e3o em duas etapas. O problema afeta todos os gerenciadores de senha testados, incluindo 1Password, Bitwarden, LastPass, KeePassXC-Browser, NordPass, ProtonPass e Keeper.    <\/p>\n<p>O m\u00e9todo de ataque baseia-se no fato de que as extens\u00f5es de navegador inserem um di\u00e1logo solicitando a autocompleta\u00e7\u00e3o da senha diretamente na p\u00e1gina exibida, integrando seus elementos ao DOM (Document Object Model) dessa p\u00e1gina. Se o atacante tiver a capacidade de executar seu c\u00f3digo JavaScript na p\u00e1gina, por exemplo, explorando uma vulnerabilidade XSS no site, ele pode manipular todos os elementos no DOM, incluindo as extens\u00f5es de navegador inseridas.     <\/p>\n<p>Entre outras coisas, h\u00e1 a possibilidade de tornar o di\u00e1logo de confirma\u00e7\u00e3o transparente e spatialmente alinhar o bot\u00e3o nesse di\u00e1logo com o bot\u00e3o de um di\u00e1logo falso, criado pelo atacante e que induz o usu\u00e1rio a clicar. Di\u00e1logos falsos podem incluir solicita\u00e7\u00f5es fraudulentas para permiss\u00f5es de cookies, banners publicit\u00e1rios ou formul\u00e1rios com CAPTCHA. Ao posicionar o di\u00e1logo falso sob o di\u00e1logo transparente do gerenciador de senhas e alinhar a localiza\u00e7\u00e3o dos bot\u00f5es na tela, \u00e9 poss\u00edvel fazer com que o clique do usu\u00e1rio acabe na confirma\u00e7\u00e3o de preenchimento das credenciais no di\u00e1logo do gerenciador de senhas, apesar de o usu\u00e1rio pensar que clicou, por exemplo, no bot\u00e3o de fechar uma janela publicit\u00e1ria.     <center><img decoding=\"async\" alt=\"Ataque a extens\u00f5es de navegador com gerenciadores de senhas utilizando clickjacking\" src=\"\/wp-content\/uploads\/2025\/08\/9df2f88789928b98278bb49ac8522c38.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>O ataque consiste nos seguintes passos:  <\/p>\n<ul>\n<li class=\"l\"> Cria\u00e7\u00e3o de um elemento intrusivo na p\u00e1gina, incentivando o clique.\n<li class=\"l\"> Adi\u00e7\u00e3o de um formul\u00e1rio web para login ou preenchimento de dados pessoais.\n<li class=\"l\"> Defini\u00e7\u00e3o de transpar\u00eancia para formul\u00e1rio web (&#171;opacity: 0.001&#187; em CSS).\n<li class=\"l\"> Uso do m\u00e9todo focus() para definir o foco no campo dentro do formul\u00e1rio, levando \u00e0 ativa\u00e7\u00e3o do di\u00e1logo de autocompleta\u00e7\u00e3o do gerenciador de senhas.\n<li class=\"l\"> Busca pelo di\u00e1logo de gerenciador de senhas que apareceu no DOM e aplica\u00e7\u00e3o de transpar\u00eancia a ele.\n<li class=\"l\"> Espera pelo clique do usu\u00e1rio em um elemento vis\u00edvel e intrusivo na p\u00e1gina, que, ao juntar elementos vis\u00edveis e invis\u00edveis, levar\u00e1 ao clique em um bot\u00e3o em um di\u00e1logo transparente e ao preenchimento dos campos pelo gerenciador de senhas.\n<li class=\"l\"> Extra\u00e7\u00e3o de dados de um formul\u00e1rio web preenchido e envio destes para o servidor do atacante.  <\/ul>\n<p>Como o preenchimento autom\u00e1tico dos par\u00e2metros de autentica\u00e7\u00e3o no gerenciador de senhas \u00e9 ativado apenas para sites nos quais esses par\u00e2metros foram salvos, para realizar o ataque \u00e9 necess\u00e1rio ter a capacidade de executar seu c\u00f3digo JavaScript no site atacado ou em um subdom\u00ednio. Assim, para o ataque, \u00e9 necess\u00e1rio obter um subdom\u00ednio no mesmo dom\u00ednio que o site atacado ou encontrar uma vulnerabilidade XSS no site que permita injetar seu c\u00f3digo no conte\u00fado entregue ao usu\u00e1rio.    <\/p>\n<p>Observa-se que muitos usu\u00e1rios utilizam um \u00fanico gerenciador de senhas tanto para armazenar os par\u00e2metros de login quanto para gerar senhas tempor\u00e1rias para autentica\u00e7\u00e3o em duas etapas, o que possibilita o uso do m\u00e9todo de ataque quando se preenche automaticamente senhas tempor\u00e1rias. Como exemplo, \u00e9 demonstrado um ataque ao site issuetracker.google.com, que cont\u00e9m uma vulnerabilidade XSS. Para obter os par\u00e2metros de login e o c\u00f3digo para autentica\u00e7\u00e3o em duas etapas, basta enviar ao usu\u00e1rio um link que explore a vulnerabilidade XSS e conseguir tr\u00eas cliques atrav\u00e9s da inser\u00e7\u00e3o de solicita\u00e7\u00f5es intrusivas fict\u00edcias (autoriza\u00e7\u00e3o para processamento de Cookies, autoriza\u00e7\u00e3o para personaliza\u00e7\u00e3o e consentimento com a pol\u00edtica de privacidade).        <center>  <video controls=\"\" style=\"width: 700px; height: 400px; max-width:100%\"><source src=\"https:\/\/marektoth.com\/video\/dom-extension-clickjacking-demo7.mp4\" type=\"video\/mp4\"><\/video>  <\/center>    <\/p>\n<p>Al\u00e9m de sites com vulnerabilidades XSS, o ataque pode ser realizado em servi\u00e7os que oferecem subdom\u00ednios a qualquer um \u2014 a maioria dos gerenciadores de senhas, na configura\u00e7\u00e3o padr\u00e3o, preenche os par\u00e2metros de login n\u00e3o apenas para o dom\u00ednio principal, mas tamb\u00e9m para subdom\u00ednios.      <\/p>\n<p>O ataque tamb\u00e9m pode ser utilizado para identificar dados pessoais salvos no gerenciador de senhas do usu\u00e1rio e os detalhes do cart\u00e3o de cr\u00e9dito. Para a exposi\u00e7\u00e3o desses dados, n\u00e3o \u00e9 necess\u00e1rio executar c\u00f3digo JavaScript no contexto de um site externo; basta induzir a v\u00edtima a acessar uma p\u00e1gina no site do atacante \u2014 nesse caso, para dados pessoais, o preenchimento dos formul\u00e1rios web \u00e9 realizado com base em seu tipo (endere\u00e7o, n\u00famero do cart\u00e3o de cr\u00e9dito, nome completo), sem associa\u00e7\u00e3o a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/domain\/\"   title=\"dom\u00ednio\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1242\">dom\u00ednio<\/a>. A mais perigosa \u00e9 a vazamento dos dados do cart\u00e3o de cr\u00e9dito, pois os gerenciadores de senhas inserem n\u00e3o apenas o n\u00famero do cart\u00e3o, mas tamb\u00e9m a data de validade e o c\u00f3digo de verifica\u00e7\u00e3o.    <\/p>\n<p>O pesquisador que identificou o problema testou 11 extens\u00f5es de navegador com gerenciadores de senhas, totalizando 39,7 milh\u00f5es de instala\u00e7\u00f5es ativas, e todas se mostraram vulner\u00e1veis a esse tipo de ataque. Alguns fabricantes lan\u00e7aram atualiza\u00e7\u00f5es (NordPass 5.13.24, ProtonPass 1.31.6, RoboForm 9.7.6, Dashlane 6.2531.1, Keeper 17.2.0, Enpass 6.11.6, Bitwarden 2025.8.1), nas quais tentaram bloquear a realiza\u00e7\u00e3o do ataque de forma indireta. Outras extens\u00f5es (KeePassXC-Browser, 1Password, iCloud Passwords, Enpass, LastPass, LogMeOnce) ainda est\u00e3o sem corre\u00e7\u00e3o. Para verificar a manifesta\u00e7\u00e3o da vulnerabilidade em diferentes gerenciadores de senhas, foi publicado um conjunto de p\u00e1ginas de teste.  <center><img decoding=\"async\" alt=\"Ataque a extens\u00f5es de navegador com gerenciadores de senhas utilizando clickjacking\" src=\"\/wp-content\/uploads\/2025\/08\/abdf3d7673c340401721d85f7e7856c6.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <center><img decoding=\"async\" alt=\"Ataque a extens\u00f5es de navegador com gerenciadores de senhas utilizando clickjacking\" src=\"\/wp-content\/uploads\/2025\/08\/3a9691b4707e6d5bfe9a2604868c896a.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>A posi\u00e7\u00e3o dos desenvolvedores do 1Password, que n\u00e3o lan\u00e7aram uma corre\u00e7\u00e3o, \u00e9 de que a vulnerabilidade \u00e9 fundamental e n\u00e3o est\u00e1 diretamente relacionada a uma extens\u00e3o de navegador espec\u00edfica; portanto, as tentativas de solucion\u00e1-la pelo lado da extens\u00e3o apenas bloqueiam vetores de ataque isolados, mas n\u00e3o eliminam o problema em si, que deve ser tratado no navegador ou com a solicita\u00e7\u00e3o de confirma\u00e7\u00e3o separada antes do preenchimento autom\u00e1tico dos campos. \u00c9 mencionado que o 1Password j\u00e1 suporta a exibi\u00e7\u00e3o de um pedido de confirma\u00e7\u00e3o antes do preenchimento autom\u00e1tico dos par\u00e2metros de pagamento e na pr\u00f3xima vers\u00e3o ser\u00e1 adicionada a op\u00e7\u00e3o de exibir um pedido semelhante para todos os tipos de dados preenchidos automaticamente (devido \u00e0 diminui\u00e7\u00e3o da conveni\u00eancia, tal op\u00e7\u00e3o n\u00e3o ser\u00e1 ativada por padr\u00e3o).         <\/p>\n<p>Entre os m\u00e9todos de prote\u00e7\u00e3o mencionados pelo autor do estudo, est\u00e1 o rastreamento da altera\u00e7\u00e3o dos estilos dos elementos inseridos na p\u00e1gina usando a API MutationObserver, bloqueio de altera\u00e7\u00f5es atrav\u00e9s do Shadow DOM em modo &#171;closed&#187;, monitoramento da defini\u00e7\u00e3o de transpar\u00eancia dos elementos, utiliza\u00e7\u00e3o da API Popover para exibi\u00e7\u00e3o de di\u00e1logos, verifica\u00e7\u00e3o de sobreposi\u00e7\u00e3o de camadas, desativa\u00e7\u00e3o tempor\u00e1ria do processamento de eventos do ponteiro (pointer-events:none) em todos os elementos flutuantes durante a exibi\u00e7\u00e3o do di\u00e1logo do gerenciador de senhas. Assim, para o bloqueio total da classe descrita <a href=\"https:\/\/prohoster.info\/pt\/zhashchita-ot-ddos\/\"  data-wpil-monitor-id=\"6\">ataques recomenda-se implementar, no n\u00edvel do navegador, uma API separada para prote\u00e7\u00e3o.<\/a> contra clickjacking.    <\/p>\n<p>Como um m\u00e9todo universal de prote\u00e7\u00e3o em navegadores baseados no motor Chromium, os usu\u00e1rios s\u00e3o aconselhados a ativar o modo de confirma\u00e7\u00e3o de acesso de extens\u00f5es a sites (Configura\u00e7\u00f5es da extens\u00e3o &#8594; &#171;acesso ao site&#187; &#8594; &#171;ao clicar&#187;), onde a extens\u00e3o obt\u00e9m acesso ao site apenas ap\u00f3s clicar no \u00edcone \u00e0 direita da barra de endere\u00e7os. Como uma alternativa de prote\u00e7\u00e3o, tamb\u00e9m \u00e9 mencionada a desativa\u00e7\u00e3o do preenchimento autom\u00e1tico de formul\u00e1rios e a c\u00f3pia de senhas manualmente atrav\u00e9s da \u00e1rea de transfer\u00eancia, mas isso levanta a quest\u00e3o da exposi\u00e7\u00e3o de dados da \u00e1rea de transfer\u00eancia compartilhada e o risco de n\u00e3o perceber tentativas de phishing.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63754\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 DEF CON 33 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u043d\u044b\u0435 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f, \u043f\u043e\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0435 \u0441\u0432\u043e\u0438 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 \u0432 \u043f\u0440\u043e\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0435\u043c\u0443\u044e \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0443. \u041f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0430\u0442\u0430\u043a\u0438 \u043a \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f\u043c \u0441 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0430\u043c\u0438 \u043f\u0430\u0440\u043e\u043b\u0435\u0439 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0445\u0440\u0430\u043d\u0438\u043c\u043e\u0439 \u0432 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0430\u0445 \u043f\u0430\u0440\u043e\u043b\u0435\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438, \u0442\u0430\u043a\u043e\u0439 \u043a\u0430\u043a \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u043a\u0440\u0435\u0434\u0438\u0442\u043d\u044b\u0445 \u043a\u0430\u0440\u0442, \u043f\u0435\u0440\u0441\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0438 \u043e\u0434\u043d\u043e\u0440\u0430\u0437\u043e\u0432\u044b\u0435 \u043f\u0430\u0440\u043e\u043b\u0438 \u0434\u043b\u044f \u0434\u0432\u0443\u0445\u0444\u0430\u043a\u0442\u043e\u0440\u043d\u043e\u0439 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0432\u0441\u0435 \u043f\u0440\u043e\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u044b \u043f\u0430\u0440\u043e\u043b\u0435\u0439, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":141440,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-141439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 DEF CON 33 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 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